Παραπομπή APA

Pontryagin, L. S. (1962). Ordinary differential equations. Addison - Wesley.

Παραπομπή Chicago Style

Pontryagin, L S. Ordinary Differential Equations. London: Addison - Wesley, 1962.

Παραπομπή MLA

Pontryagin, L S. Ordinary Differential Equations. Addison - Wesley, 1962.